Fix aarch64 and x86-64 AndroidConfig.h.

_LARGEFILE_SOURCE should never be defined with bionic.
_FILE_OFFSET_BITS should be 64 on 64-bit architectures.

Change-Id: I7acf6b39a3af7782d5d7ad00f709593d96fa8522
Merge "Fix aarch64 and x86-64 AndroidConfig.h."
Merge branch 'master' of https://android.googlesource.com/platform/build into HEAD